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Repairing of a timber truss through two different techniques using timber elements and screwed metal plates
GESAAF - Department of Agricultural, Food and Forestry Systems, University of Florence, Italy.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.
ISISE - Department of Civil Engineering, University of Minho, Guimarães, Portugal.
ISISE - Department of Civil Engineering, University of Minho, Guimarães, Portugal.
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Number of Authors: 5
2015 (English)In: Historical Earthquake-Resistant Timber Framing in the Mediterranean Area: HEaRT 2015, 2015, 371-381 p.Conference paper, Published paper (Refereed)
Abstract [en]

Structural reinforcement of timber buildings may be needed due to different reasons such as change of use, deterioration, lack of maintenance, exceptional damaging incidents or loading, to comply with regulatory changes and being retrofitted, or interventions to increase structural resistance.In this work, two different techniques were considered for repair of a timber truss, subjected only to vertical loads, that was previously assessed on laboratory (test facilities of University of Minho) and taken up to failure during a load-carrying test. A collar beam truss, with more than one hundred years, was tested carrying a vertical point load on each main rafter. Failure of the timber truss was located in the sections of the rafters near the loading positions by bending.Repairing techniques, based on the use of timber elements for one of the rafters and on screwed metal plates for the other rafter, were evaluated and compared to the original unstrengthened condition. The efficiency of the combined repairing techniques was evaluated taking into consideration the structural performance of the collar truss, namely its displacement and ultimate load capacity.In this paper, the results of the experimental tests are discussed attending to the analytical calculation of the contribution of the repairing techniques. Also, the different failure scenarios, for original and strengthened truss, were analyzed and compared.

Place, publisher, year, edition, pages
2015. 371-381 p.
Series
Lecture Notes in Civil Engineering, ISSN 2366-2557 ; 1
National Category
Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-38445DOI: 10.1007/978-3-319-39492-3_31ISI: 000392437200031Local ID: cda7e3a3-904d-49f6-9bdb-cb81182f3535ISBN: 978-3-319-39491-6 (print)ISBN: 978-3-319-39492-3 (print)OAI: oai:DiVA.org:ltu-38445DiVA: diva2:1011946
Conference
International Conference on Historic Earthquake-Resistant Timber Frames in the Mediterranean Region : 02/12/2015 - 04/12/2015
Note

Godkänd; 2015; 20151201 (nicbjo)

Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-10-19Bibliographically approved

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